Self-Crank USB Charger
Product Description :
This Self-Crank USB Charger is designed for emergency use or just a toy for fun.
With this built-in USB interface, it is easy to connect to all sorts of USB devices. Just wind it by hand slightly, it can charge the device freely.
Can be repeated use, light weight and small size, convenient to use for traveling.
With a durable wrist strap, easy to carry it to anywhere you want. A mobile phone with a battery that is completely down will not be charged. You should charge your phone before the battery has completely run out.